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https://github.com/f4exb/sdrangel.git
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151 lines
6.4 KiB
C++
151 lines
6.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2017 Edouard Griffiths, F4EXB //
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// Copyright (C) 2021 Jon Beniston, M7RCE //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef PLUGINS_CHANNELTX_MODDATV_DATVMODSOURCE_H_
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#define PLUGINS_CHANNELTX_MODDATV_DATVMODSOURCE_H_
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#include <vector>
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#include <fstream>
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#include <iostream>
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#include <cstdint>
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#include <QObject>
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#include <QMutex>
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#include "dsp/channelsamplesource.h"
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#include "dsp/nco.h"
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#include "dsp/interpolator.h"
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#include "dsp/rootraisedcosine.h"
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#include "util/movingaverage.h"
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#include "dsp/fftfilt.h"
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#include "util/message.h"
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#include "datvmodsettings.h"
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#include "dvb-s/dvb-s.h"
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#include "dvb-s2/DVBS2.h"
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class MessageQueue;
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class QUdpSocket;
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class DATVModSource : public ChannelSampleSource
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{
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public:
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DATVModSource();
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~DATVModSource();
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virtual void pull(SampleVector::iterator begin, unsigned int nbSamples);
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virtual void pullOne(Sample& sample);
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virtual void prefetch(unsigned int nbSamples);
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int getEffectiveSampleRate() const { return m_channelSampleRate; };
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double getMagSq() const { return m_movingAverage.asDouble(); }
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void setMessageQueueToGUI(MessageQueue *messageQueue) { m_messageQueueToGUI = messageQueue; }
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void getLevels(qreal& rmsLevel, qreal& peakLevel, int& numSamples) const
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{
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rmsLevel = m_rmsLevel;
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peakLevel = m_peakLevelOut;
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numSamples = m_levelNbSamples;
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}
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void geTsFileInfos(int& mpegTSBitrate, int& mpegTSSize) const {
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mpegTSBitrate = m_mpegTSBitrate;
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mpegTSSize = (int) m_mpegTSSize;
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}
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int64_t getUdpByteCount() const { return m_udpAbsByteCount; }
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int getDataRate() const { return getDVBSDataBitrate(m_settings); }
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void applyChannelSettings(int channelSampleRate, int channelFrequencyOffset, bool force = false);
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void applySettings(const DATVModSettings& settings, bool force = false);
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void openTsFile(const QString& fileName);
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void seekTsFileStream(int seekPercentage);
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void reportTsFileSourceStreamTiming();
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void reportUDPBitrate();
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void reportUDPBufferUtilization();
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private:
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uint8_t m_mpegTS[188]; //!< MPEG transport stream packet
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std::ifstream m_mpegTSStream; //!< File to read transport stream from
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int m_mpegTSBitrate; //!< Bitrate of transport stream file
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std::streampos m_mpegTSSize; //!< Size in bytes of transport stream file
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RootRaisedCosine<Real> m_pulseShapeI; //!< Square root raised cosine filter for I samples
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RootRaisedCosine<Real> m_pulseShapeQ; //!< Square root raised cosine filter for Q samples
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DVBS m_dvbs; //!< DVB-S encoder
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int m_sampleIdx;
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int m_frameIdx; //!< Frame index in to TS file
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int m_frameCount; //!< Count of frames transmitted, including null frames
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float m_tsRatio; //!< DVB data rate to TS file bitrate ratio
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int m_symbolCount; //!< Number of symbols returned from DVB-S encoder
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int m_symbolSel; //!< I or Q symbol for BPSK modulation only
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int m_symbolIdx;
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int m_samplesPerSymbol;
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uint8_t m_iqSymbols[DVBS::m_maxIQSymbols*2];
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DVBS2 m_dvbs2;
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DVB2FrameFormat m_dvbs2Format;
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scmplx *m_plFrame;
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QUdpSocket *m_udpSocket; //!< UDP socket to receive MPEG transport stream via
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int m_udpByteCount; //!< Count of bytes received via UDP for bitrate calculation
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int64_t m_udpAbsByteCount; //!< Count of bytes received via UDP since the begining
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boost::chrono::steady_clock::time_point m_udpTimingStart; //!< When we last started counting UDP bytes
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uint8_t m_udpBuffer[188*10];
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int m_udpBufferIdx; //!< TS frame index into buffer
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int m_udpBufferCount; //!< Number of TS frames in buffer
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int m_udpMaxBufferUtilization;
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int m_sampleRate;
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int m_channelSampleRate;
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int m_channelFrequencyOffset;
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DATVModSettings m_settings;
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NCO m_carrierNco;
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Complex m_modSample;
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Interpolator m_interpolator;
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Real m_interpolatorDistance;
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Real m_interpolatorDistanceRemain;
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MovingAverageUtil<double, double, 16> m_movingAverage;
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quint32 m_levelCalcCount;
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qreal m_rmsLevel;
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qreal m_peakLevelOut;
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Real m_peakLevel;
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Real m_levelSum;
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bool m_tsFileOK;
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MessageQueue *m_messageQueueToGUI;
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static const int m_levelNbSamples;
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void pullFinalize(Complex& ci, Sample& sample);
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void calculateLevel(Real& sample);
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void modulateSample();
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int getTSBitrate(const QString& filename);
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int getDVBSDataBitrate(const DATVModSettings& settings) const;
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void checkBitrates();
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void updateUDPBufferUtilization();
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MessageQueue *getMessageQueueToGUI() { return m_messageQueueToGUI; }
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};
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#endif /* PLUGINS_CHANNELTX_MODATV_DATVMOD_H_ */
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